let isDne:boolean = false
// isDne = true

let age: number  = 10

let firstName: string = 'VIKING'

let message:string = `hello ,${firstName}`

let u:undefined = undefined 

let n:null = null

let num:null = undefined

let notSure:any = 4

notSure = 'maybe a string'
notSure = true 
notSure.myName
notSure.getName()